Meanings of real drum in English

It has not even a real drum-notwhat I call a drum.

Just like a real drum, the rim makes different noises when you hit it in different places.

Turn it into a djembe or conga and the different parts of the "skin" respond as you'd expect a real drum to.

The Wavedrum requires an amp and a power source, obviously, so it won't be replacing the real drum you carry to the park on Sundays.

The real drums of jeopardy weren't emeralds but the roll of warning that prescience taps upon the spine, the occult sense of impending danger.